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Heparin-induced thrombocytopenia (HIT) is the development of thrombocytopenia (a low platelet count), due to the administration of various forms of heparin, an anticoagulant. HIT predisposes to thrombosis (the abnormal formation of blood clots inside a blood vessel ).
More rarely, this phenomenon had previously been described as an autoimmune phenomenon in people who had not been exposed to heparin. [29] One striking feature of thrombocytopenia in the presence of anti-PF4 antibodies is the propensity of some to develop thrombosis, a phenomenon called heparin-induced thrombocytopenia if heparin is involved. [30]
Heparin is an anticoagulant, and if used as a catheter lock solution it could leak into the blood circulation of the patient. Therefore it has been associated with catheter-related bleeding and heparin induced thrombocytopenia (HIT). [8] [9] Citrate catheter lock solutions are being used in three different concentrations – 4%, 30% and 46.7%.
Once the Heparin therapy is initiated, the patient's PTT (partial thromboplastin time) levels will be monitored closely per hospital protocol to prevent excessive anti-coagulation. If a patient is allergic to Heparin or has a condition known as Heparin-induced Thrombocytopenia (HIT), an alternative intravenous anti-coagulate may be used.
Smaller risk of heparin-induced thrombocytopenia, a potential side effect of heparin. Hepatin's anticoagulant effects are typically reversible with protamine sulfate, while protamine's effect on LMWH is limited. LMWH has less of an effect on thrombin than heparin, but about the same effect on Factor Xa.
Another potentially severe complication associated with heparin use is called heparin-induced thrombocytopenia (HIT). [57] There are two distinct types: HIT 1) immune-mediated and 2) non-immune-mediated. [57] Immune-mediated HIT most commonly arises five to ten days after exposure to heparin. [58]
It should also be avoided in patients with heparin-induced thrombocytopenia (HIT) or disseminated intravascular coagulation (DIC). [ citation needed ] In adults, platelets are recommended in those who have levels less than 10,000/μL, or less than 20,000/μL if a central venous catheter is being placed, or less than 50,000/μL if a lumbar ...
Argatroban is an anticoagulant that is a small molecule direct thrombin inhibitor. [3] In 2000, argatroban was licensed by the US Food and Drug Administration (FDA) for prophylaxis or treatment of thrombosis in people with heparin-induced thrombocytopenia (HIT).